نتایج جستجو برای: fading window
تعداد نتایج: 82238 فیلتر نتایج به سال:
Expressions of ASER for different M-ary modulations and outage probability of dual pre-detection equal gain combining (EGC) receiver have been derived over correlated Nakagami-m fading channels with arbitrary and non-identical fading parameters. A classical probability density function (PDF) based approach has been used to obtain expressions of different performance measures. The mathematical a...
In this paper, system operating margin (SOM) is estimated for vehicular ad-hoc networks in absence and presence of Rayleigh fading. The Ad-hoc IEEE 802.11 model is considered for estimating the signal strength and system operating margin. Rayleigh fading was then simulated and system operating margin are estimated in Rayleigh fading environment for different standard modulation schemes. Keyword...
Differential space-time modulation (DSTM) for multiple antenna communication systems has been recently proposed for frequency-nonselective fading channels. In broadband multirate systems, frequency-selective fading may occur. In this paper, the DSTM in frequency-selective fading channels is considered. A linear equalizer for the DSTM is proposed over frequency-selective fading channels. Further...
In this paper the receiver for the demodulation of M-FSK signals in the presence of Gaussian noise, intersymbol interference, impulse interference and fading is considered. The probability density function of M-ary FSK signal in the presence of noise, interference and fading is derived. These interferences can seriously degrade the communication system performances. Key-Words: M-ary Frequency S...
Mixed vanadium-/manganese-based NASICON cathodes are attractive for practical sodium-ion battery application due to their low cost and toxicity. Although the previous reports demonstrate remarkable performances of bulk Na3+yV2?yMny(PO4)3 cathodes, full utilization is limited by lower electronic conductivities longer Na-ion diffusion lengths. To overcome this issue, herein, structural electroche...
In this study, the pure nano-structure hydroxyl apatite samples were synthesized via hydrolysis method. The powder samples were sintered at various temperatures of 500°C, 700°C and 900°C in a furnace. X-ray diffraction (XRD) and Fourier transform infra-red (FTIR) spectroscopy systems were used to characterize the synthsized samples. Comparison of the glow curves shows that the most ...
Physical-layer network coding (PLNC) has the ability to drastically improve the throughput of multi-source wireless communication systems. In this paper, we focus on the problem of channel tracking in a Decode-and-Forward (DF) OFDM PLNC system. We proposed a Kalman Filter-based algorithm for tracking the frequency/time fading channel in this system. Tracking of the channel is performed in the t...
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